Roll-film holder for cameras



vfFeb. 22,1927. 1,618,387 E. J. FRnmaLl-t` ROLL FILM HOLDER FOR CAMERAS Filed Feb. l8. 1924 6 Shee'ts-Shget 1 ATTQRNEYg lill r ffWllllilw MW, Innig, (lll. |l|| A mmv\\ Feb. -22 1927.

a. J. PRINDLE nom.. FILM Hom-:R von @Ansus Fued'reb. 18. 1924 e shuts-sheet 2 Feb. v22 1927.

E. J. PRINDLE ROLL FILM HOLDER FOR CAMERAS Filed Feb. 18, 1924 6 Sheets-Sheet 3 Feb. 22, 1927. 1,618,387

E. 1. PRINDLE ROLL FILM HOLDER yF011 v CAMERAS Filed Feb. 18, 1924 6 shuts-Sheet 4 A Tl 1- 40 574441' 41 .5a .315.5410 31638 35,;4 367 Zi INVENTOR ATTORNEY 1 v k. n m. N am E am f INVENTOR ATTORNEY Fi'led Feb. 18, l924 Feb.. 22,1927.

ROLL, FILM-HOLDER FOR CAMERAS Feb. 22, 1927.Y

. v E. J. PRlNDLE Rom. FILM HOLDER Fon cmmms Filed Feb.l 18. 1924 sn'eetsfsheez e l INVENTOR ATTORNEY Parental Feb. 22, 1921.

UNITED s'rAJEs EDWIN J'. PRINDLE, 0F SOTH ORANGE, NEW JERSEY.

ROLL-FILM HOLDER FOR CAMERAS.V

Application `le February 1B, 1924. Serial'NofGSASZ.

The object of my invention has been to provide a roll film holder for Cameras using film in rolls, in which the .operat1on of placing a new film in the camera shall be greatly simplified and shortened without loss of effi-- ciency, and to suchends my invention con-V sists in the roll film holder for cameras.

hereinafter' described;

In the accompanying drawings:

Fig. 1 is a vertical sectional view of ther roll film holder of a camera embodying my l invention, taken on line 1#1 of Fig. 2.

(Fig. 2 is a sectional View taken on line 2 2 of Fig. 1, showing' both spools removed.

Fig. 3 is an enlarged vertical section of the film-winding handles of Fig. 1 with adjacent parts. f

Figs. 4l, 5, and 6 are other sectional views of the parts in Fig. 3 including one view of the parts in Fig. Bwith the plate that enters the slot in the spoolraised, so that the spool can be removed.

Fig 7 is a perspective .view of theparts other station asa result of the preceding shown in Fig. 3 in disassembled relation.

Fig.- 8 is a side elevation of the parts for detecting an empty. spool and preventing the mechanism for controlling the winding mechanism from being rendered inoperative thereby. Y

Figs. '9, 10,and.11 are viewsof the mechanism for detecting an empty spool, showing the different positions when a full spool is placed in the camera.

Figs. 12, 13 and 14 are views of the same.

mechanism Yshowing` provision for preventing the operation of the control'mechanism by the-formation ofa. roll of film Aas it is wound on' the empty spool in using the camera. Y

Fig. 15 is a view ,similar'toFig 2, showing the right-hand spool station empty and- Show-lng 1211 left-hand station occupied by an empty spool.

hand station.

Fig. 17 is a View similar to Fig. 16, but with the film fully rolled Vup on the spool in the left-hand station.

cept that the full spool in the left-hand station has been removed so that Asaid station is ready for a newfull spool.

Fig. 19 is a perspectiveiafiewr ofthe'lparts for detecting an empty spool.

Figs. 2O and21 arepcrspective top and advanced to engage the spools. Fig 16 is a view similar to Fig. 15, but with. a full spool introduced into therightbottom views of the camthat is operated by the parts. in Fig. 19 for controlling the winding mechanism.

In loading cameras with roll lms, as such canjieras are ordinarily constructed, only one of the. two stations for receiving spools is provided with winding mechanism, and it 1sV because to provide both stations with winding mechanism has, as heretofore attempted, involved ditliculties which either permitted the making of mistakes in winding the wrong lspool when attempting to feed an unexposed portion of the film into position for taking a picture, or failing to keep the lm fiat so as to form an opticallycorrectsurface, or otherwise failing to effect an efficient and orderly exposure. My invention Vovercomes these diiiiculties and simplifies the. operation of loading the camera, so that a new roll of film need only be introduced into whicheverl spool station of the ycamera is empty,fand can be threaded into the empty spool which .always remains in the operation; and this without fear of mistake in feeding the film after the camera is closed. While I have chosen the' best embodiment of my invention known to me with which to illustrate the Vspirit of that invention, my invention is capable of embodiment in manyv different forms, andthe invention is therefore notto be confined to the illustrated form beyond the necessary `intendment of the claims.

In the illust-rated embodiment, the roll,

film holder (Figs. 1 and 2) is'provided with two roll stations, 1 and 2, having onthe lower side studs 3 and t, respectively, for forming bearings for one end of the film spools in the usual manner, said studs carrying flanges 3f# and 4a Vso that they may be retracted for the removal of the spools and At the top ofeachspool station,there is mechanism by which the spool may be engaged and manually turned for winding the filml thereon. I desire to lconstruct each of such mechanisms so that the said winding mechanism at the station occupied by the fresh spool Fig. 18 is a `viewsimilar to Fig. 1 7, eX'- shall not only be disengaged'to permit the Y position. In the present instance, thesaid wiiidinp; mechanism at the le'ftdland stai tion, as seen in Figs. l to 6, is constructed as follows:

Attached to or forming a part of the body ot the camera or tihn holdeiI are plates :i and G, reslieetively, having holes T end 8 which are concentric va'ith the position which it is desired to have the axis olf the spool occupy. ln the hole T is placed a cup-shaped part 7'" in which inounted an inner cylindrical sleeve 9 haring.;- a concentric hoie in `which a rod l()` 4is inounted that carries at .itslower end the usual plate ll for eilig-agenient with a slot in the upper end of the spool `lor turning the spool. 'lhe winding,` handle l2 is mounted on a plate lfS that is riveted, or otherwise secured, to the upper endet the sleeve let, which sleeve is mounted upon hut keyed to the inner sleeve 9. The rod ltlis provided with a head 15 oit sullicient dianieter to rest upon the end oit the sleeve lst. liv this construction. the plate ll can he withdrawn :troni the slot in the spool hy raising the handle, and vet. because ot the key-and-slot connection between the tivo sleeves, the handle and the inner sleeve 9 willalways he rotatably connected. l desire to he ahle to rotative/lyY coiineet and disconneet the handle l2 :troni the plate ll. and for that piirpose the lower end of the inner sleeve 9 is provided with teeth lo which are adiipted, to engage a corresponding series ol teeth l that are lforincd ou a ,sleeve 18 that is mounted in a cupshaped part o that is `seated in the hole inthe lower plate (i. The rod l0 also passes through the sleeve 1S. The latter sleeve is provided with a slot 1t) that rotativeiy engages the plate ll with the `said sleeve while permitting the plate to he raised and lowered with the handle 1Q. The sleeve ld is also provided with a Hanne Qt) that is adapted to rest against thennner sideot the cupsshaped part 8, and a spiralspring` is interposed hetween the plate ll `and the "said tienne. so that, while the plate ll can he re' l and lowered. the sleeve le will he heldnith its llange against the innerside olE `the cup-shaped part and the sleeve hl will normally he held `against the inner side olI the cuoshaped part 'in'. The sleeves 9 and 1S. with their respective sets olf teeth :torni in eifeet a clutch "oy which the handle .l2 may he rotativeljvengaged with or disen ed troni the plate ll rosieetiveljvv hy sh n e' 'the sleeve il op or down without changing'lthe vertical relations ot any` of the other parts. Lilcew ze. the han die l2 and plate ll may he raised (Fig. and lowered without destro. lne' the vertical relation of the clutch inenihtrs; i. e. without i causing' them to change troni a cifndition oit engagement to one oit disengrae'enient, or rice Versa. 'the sleeve 9 is pre 'ided `with a series ot teeth 22 that, in the upper position.

are adopted to engage a correspoinlinp; series oi. teeth that are :formed on the cup-shaped ineniher '7a. ,lllus. when the sleeve i) is raised to disengage the clutch teeth, the teeth 22 on the said sleeve engage the teeth 23 and loci; the sleeve lroni rotation. This also, through they lcey-andslot connection hetween the sleeves i) and lh locks the handle l2 :troni rotation. ln order to raise and lower the sleeve 5) to connect aud disconnect the clutch, the said sleeve engaged with a leaf spring- A, hy beingr mounted in a. hole tl1ere in, the sprine` being' confined between a tiange on the sleeve and an annular ratchet wheel 1:25 that is fastened on the sleeve, as hy being driven thereon. The spring' Ll is provided with Iaiwlsti and 2T that are adapted to engage [he teeth on the ratchet wheel, so that a spool which is engaged hy the plate .ll may oni)`- he wound in the proper direction. to wind up .tresh film `itroin a lull spool in the opposite spool stationand cannot he turned in the opposite direction.

In order to prevent mistakes, it is necessary that the winding' mechanism at one spool station he interloclied with the correspending` mechanism at the other spool station, so that the windinginechanisn'i where the fresh spool has heen introduced will he disconnected and will not prevent or retard the unwindingl ol that spool under the pull ol the opposite ineehanisuuhat 'also so that the said tiret-nientioned windiiip; mechanism cannot. he turned at all. 'the purpose ot the latter is `to prevent confusing the person usiner the camera as to which otthe two winding mechanisms he `should turn, and

thus to save nialiing double exposures. For

this purpose, the following inter-looliing,I mechanism is provid :d hetween `the two winding stations.

The spring 2l may he oinitinuous from one winding mechanism to the other, so :that onl",7 a single sprinpy need he used. sary in this particular einhodiznentto proride n'iechai'iism that shall raise that end of the'spring which is i t the 'fresh spool sta? tion, so as to disconnect the clutch, and at the saine time to lower that end of the said 'spring which is at the einpty'siiool station. so as to connect the clutch. "LV is I acconiplish by piwn'icling;l a plate or disk that is pivoted through the said springl and inidwa;Y hetween the #wo winding mechanisms and that has on its uiuiei' side tivo cams, re`

spectively 29 and tt), tlu` cam 2S) heine;

adapted to depress the letthaud end ot the spring :Zalupon rotation ot the disle and the cain 30 henni` adapted to depress the righthand end ot the said] spring' when the disl: i

is rotated to hringr it over the said spring'.

l desire to utilizo the motion of the fresh spool in being introduced into the camera, for so rotating the disk 2S that `the adjacent end of the spring 24, will he elevated llt is neces-` `to disconnect the clutch and lock lthe handle from rotation whilethe opposite end of the spring will be depressed to engage the clutch and unlock the handle at that end, so that the latter will be free to rotate. I therefore pivot a lever 31 on a pin 32 on the frame of the camera, in such a position that its arm 31a will be engaged, either by the flange on the spool or, if desired, by a portion of the roll of film on the spool. ln the latter case, the lever should be so positioned that it will only engage the roll of film close to the flange, since the pressure of the lever on the film might result in blackening the film where the pressure occurs when it is developed. By placing the lever 31a so that it engages the film only close tothe flange, lit` tle harm will be done, since that portion of the film is usually covered by the flange of the printing frame. TheV oppositearm 31b of the lever 31 is provided with a pivoted nose 31C, the nose and lever having co-acting shoulders, so that the nose can yield upward, as seen in the Figures of the drawings, but cannot yield downward relative to the lever.

A spring 31d holds the nose so that the said shoulders willv normally be in contact. 'A spring 31e tends to hold the outer arm 31*l of the lever 31 in a forward position, so that it can be pushed back by movement of the spool in being inserted into position in the station. This action of the spring also tends Y to hold the pivoted nose 31c to the rear of a lug 38 which is so placed on the disk 28 that when the said pivoted nose is swung forward bythe action of the spoolY in swing` ing the arm'31a backward, the lug 38 will be carried forward with the pivoted nose and will rotate the disk and swing its c-am 29v over the spring 24 to depress thelatter. lVhen the spool is removed from its station, the arm 31a will be swung forward by the spring 31e against a piny or lug 31f on the frame, the pivoted nose 31 beingpermitted to turn on its pivot and ride idly overthe pin 38 in order to vget behind the same so that at the proper time it will again move the said pin forward and shift the disk with` its cam.

At the right-hand spool Ystation Ais a lever 33 which is constructed precisely like the lever 31, except that 'itl lies in the opposite direction, and its parts have therefore been numbered the same as those of the left-hand mechanism previously described, except that the numerals have been primed, and do (not need to be further described.V The disk 28 is also provided with apin 3114 that is adapted to engage a hump 35 on'the spring 36,

whose ends are secured to the frame, as by pins 37. Thus, when the disk 28 is being rotated, the hump is moved upward by the until the latter passes'over the crest pin134v v when the reaction of the of the hump,

spring will throw the hump downward and rectly engaged by the fla-nge or the film on a new spool, as it is being inserted into the camera, such construction has the limitation that, where the lever is engaged by the flange of the spool, the mechanism can make no distinction between a full spool and one having no lilm upon it, and, where said lever engages the film, the power to shift the said lever is` derived by reaction from the pressure of the film itself against the lever. As it is possible that such pressure might injure the image portion of the film and cause vit to turn black upon development, I preferably use the special form of mechanism which is illustrated in the drawings, in which the first contact of the loaded spool is withV an easily movable part, or trigger, which is merely touched by the film, if it be present, and which, when so touched, locks a part to the lever, which part is in positionV spool will engage it as the spool is intro-A duced into the camera.

in perspective in Fig. 19) is pivoted at l5 upon the finger 40 and has toe 46 which extends toward the spool and is positioned at a level below the flange 43, so that when the trigger is rocked down` as seen in Fi 10, the said toe is so far in advance of the lip 42 that if the spool be loaded with film, the film will engage the said toe before the flange 4:3 engages the lip 42. he trigger is provided with a heel 217 so that when thev trigger is swung down. as seen in Fig. 1Q` by the presence of film on the spool, the said heel will be in position to engage a projection orshoulder 48 that is formed on the lever 31. A pin, or other shoulder. 49

A trigger le (shown is preferably formed on thefinger 40 to forni a stop for the heel 47, and is placed sufficiently far from the pivot 41 ofthe finger y so .that itwill not itself engage the shoulder e8 on the lever if the finger be swung buckward when not locked to the lever. A springv 50 on the lever arm 31a Vtends to hold the A,

finger Ain line with the lever and against a lug 431gon Vthe lever. A spring 51 on the finger tends to hold the trigger in position Fie'. Ill.

against a ling 42 in whieh il' proieete lorward olD the .lip fl-2. The sprint4 nl) ifs made stronger than the spring el, ao that the trie-ger will l e moved by the l'illn before the linger will more. rlhe trigger mechanism at the opposite spool station :lroni that described is the saine as `that just described, exeeplmthat the parts project in the opposite direction, and the ilelferenee numerals,l ot the ooi-responding parts are therefore iliade the saine `exept that the)Y are primed.

ill-he `spools need `in my eainera are preferably lprovided at both ende both with Slots fll torthe `platee; ll and with holel eli-5l for the studs l and el.

The action oli the illuetral'ed embodiment ot my invention is as follows:

Assuming the ramera to be empty. an empty lepool is introduced into either of the Spool stations, Say. the lel'thand Station oil' Fig. 15. in the usnal wayf by drawing back the ,stud 3 yor el `and the eorreepoialine` plate 1l, introducing).n the Spool, and then moving; the said stud and `plate inward to engage the spool, This introduction of the empty Spool is only neeessarr the .tiret tiine the ealnera is used and need never be repeated.

Putting `an empty spool in place has no elfeet 1on the interlocking;v n'ieehaniain beeauSe. haring' no .lihn wound thereon. .it cannot operate the trigger 4 4. whirh, as will be Shown later. is a necessary pri-neqnle'te to `any aetion of the interloekine nieehaniam. fr spool haring' a roll ol.` lihn wound thereon is: then placed in the other spool station. :-ay, the right-hand Station ot Fig', l5. and the end ot this film is threaded into or otherwise attached to the empty spool, as Shownin Fig. lli. In introducing the inll spool. into it station, first `the lihn engages the toe dell ol' the trigger ael, as shown in Fig. 9, the said toe beingl projected fori 'ard toward the Spoel. so that. the Spool advancesA into the station. the toe is carried backward to the position shown in Fig. l() and the trigger is swung on its pivot so that its heel L'ifi' is swung to position in front oil1 the Shoulder 43S. The. linger elli remains stationary in the poeition shown in Figs. l) and lll during this swinging ot the trigger. because its spring; 50 stronger than the Spring al ot' the trigger. The spool advance@ in the direction ot' the arrow in Fie'. l() until its llante f-Pl engages the lip itil on the linger lll when the said lin and linger travel nachi ward with the spool. This eanees the heel fl-T of the trigger to engage the lue' its on the lever arni Wl and to nieve relatively 01') toward the pin or Shoulder all. when 'Further movement ot the finger el-(l will cai-rr the lever arrn 33" baelward. thelingrer. tr; y and lever movingr as one part, as shown in The backward movement ot the outer end of the lever arin rauszea the opposite arm 33 to more Jforward. and eanSeS itel `piroted noe 3l to engage `and carry forward the pin 3901i the disk 3%. `Bythis action `the Said disk so .rotated that `its eain `29 will `depress the fleft-hand end o'l the sprinfv 2l. and the said spring will more the inner eleeve 9 of the left-hand station downward (to the position `in Fig. l) so that its series ot' teeth 16 will engage the series ot teeth 17 `on the sleeve 18, thus unloekingithe teeth et the sleeve l) troni theA teeth Q3 on the enlrrihaped parli "T, `so that the Said sleeve can rotate, and at the saine time leekine' the Said Sleeve to the Sleeve 1S so that the plate ll is rotatably connected. This acl-ion unloels the Said windingr ineehaniem oll the lelit-hand station so that it may he rotated `in a direetion to wind up the (ihn. and at the saine time rotafilabliY `looks ithe handle 12 with the plate l1 through the inner and enter sleeves l) and 14k which are lieg/*ed l'i'igielhen` and the sleeve 18 whose teethli' are nieehed with the teeth. lo' on the inner sleeve l), as Shown in Fig. 8,

)it the saine linie that the cani :29 on the disk depresses the lelt-hand end ot the spring 2l. kthe eain El() on the said disk per inline the ri.;'hthaiul end of the said spring lo rise. and this action by raising' the Sleeve Sl ot the right-hand station having; the tall spool therein. disconnects itsteeth 1G from the teeth li olf the lower sleeve .18", as :shown .in Figs. l and 5. Thug the plate ll is disconnected :lroin the handle and 'isi free to rotate under the. pull olf therspool at the opposite etation upon the lilin, while the teeth 22 o'lI the Sleeve 9" are engaged with the sleeve .23 on the faipshaped part 7" and are looked lroni rotation thereby, so that the handle ol the right-hand :station cannot be rotated.

Thus. the `introdnetion oi' a Yfull Spool into the right-hand Station in Fig. `1G has,` resulted in looking the handle ot that station iironi rotation while reloaeing ite` plate l1', asin Figs. `l and eo that at may rotate in response to the pull ol" the Winding ineehanisni at the other station.

lilhen the lihn has been entirelj7 Wound np on the lett-hand spool, as Shown in Fig.

Il?. and the 'amera is opened :tor reloading, it is only heeel-Leary to remove the epooli'roni that station. aa shown in Fig. le. `and to introduce a new lnll .spool into the Same filiation without. as is eoninion praetioe at present. harinav to talle the empty spool iironi the right-hand station and place it in the lett-hand station. The act et introducing the new epool into thelelt-hand sta-i tion `results `in moving its lever-arn1 3l", so

lo swing' the diei( in the opposite direction. Awhich trees the handle ol the righi'- hand etation. -1o tha t il: may be rotated, and ronples it with the, plaie ill siol'hat. when rotated. it will, carry `the :inool with it.. while at .the `sinne time the handle at the lett-hand station is rotatably disconnected from its plate 11 and Vis also locked from rotation. No mistake is possible, as only the proper handle can be rotated, and its pawls 26 and 27 permit it to be rotated only in the right direction.. The film is put unoer tension by-being wound up so that it is maintained flat and presents an optically correct surface upon which to throw the light image.

It' therev were an vempty spool in the camera, and, instead of introducingl a full spool int-o the opposite station,the user should introduce an empty spool into said station, the interlocking mechanism would not be thrown into an incorrect position, because, in order that either lever 31 or 33 may be operated'at all, the corresponding` trigger 44 must be engaged by film on the roll so as to swing its heel 47 into position to en- Cil Cil

has been swung gage the shoulder 48 of that lever.`

' Then film isrolled upon an empty spool, as in Fig. 13, the growing roll of film will engage y ing trigger, as in Fig. 14, and swing the heel ofthe trigger toward the pivotvof the linger 40. In order, however, that the heel may not strike against the end of the shoulder 48 and be prevented from further movement, and injury thus vbe done to the mechanism and film, the said shoulder is preferbalyinade narrow, so that the said heel, owing to the fact that the linger 40 backward without carrying with it the lever arm 33a, maymove behind the shoulder and may avoid contact therewith, as shown in Figs. 14 and 17.

My invention will substantially simplify the reloading of the roll filmholder or camera. This will not only make the camera. of' less trouble for a skilledy user to manipulate, but, being entirely automatic, it will enable a beginner to take up the use of the camerarmuch more easily.

My invention will also shorten the length of time re uired to reload the camera or film holder y at .least one-third. This saving in time is-very important on many occasions. Then taking photographs from a moving object, as a train, a vessel, or an automobile, and especially of anothermoving object, as another vessel, if one wishes `to make more than one exposure, and the lirst exposure proves to be the last'one on a film, the shortened time of reloading made possible by my invention may make further exposures from different positions possible which would have been impossible if the longer time of ordinary reloading were required,

It to be understood that where the term full is used with reference to a spool, I

the term means merely a spool having film wound therein as distinguished from an empty spool carrying` no film.

the toe 46 of the correspond? l/Vhile my invention affords these various substantial advantages, its operation is entirely automatic and the mechanism does not require the slightest attention from the user. It therefore does not divert the attention from nor add any complication to the 'use 'of the camera, which is already suiiiciently complicated by need of attention to the focus, stop, distance, time of exposure, etc. i

I claim:

y1.`A roll film holder for cameras having winding mechanisms at. both spool. stations and means for rendering Yone of said mechanisms operative and the other inoperative when a spool containing film is introduced into a spool station. l

2. In a roll film holder for cameras, the combination of winding mechanism at both spool stations, means whereby one of said mechanisms is disconnected from its spool when the other otl said mechanisms is rendered operative, and means whereby the handle of said first-mentionedmechanism is also thereby locked from turning. n

3. rIn a roll film holderl` for cameras, the combination of winding mechanism at both spool stations and interlocking mechanism whereby upon the introduction of. a roll of film into the holder, one of said winding mechanisms is rendered inoperative and the other operative, the parts being so constructed that, the film is unwound :tromthe full spool by tension of the film.

4. A roll film holder" for cameras winding mechanism at both spool stations having and means whereby the introduction of a f spool containing film into one station shall render the winding mechanism of that station inoperative.

5. A roll film holder for cameras having winding mechanisnrat both spool stations and means whereby the introduction of a full spool into one station shall render the winding mechanism of .that station inoperative.

6. A roll film holder `for cameras having winding mechanism` at both spool stations and means whereby the introduction of a spool containing film into either station shall render inoperative the winding mechanism of that stationV and render operative the winding mechanism of the other station.

7. A roll Elm holder for camerashaving winding mechanism at both spool stations all) part relpiiringr tive, said means comprisingr a l; contact with to he preliminarilv moved film on the spool.

9. In a roll film holder vtor cameras. the combination of winding' mechanism at bolli spool stations, interlocking` mechanism wherclly when one oft' said winding; mechanisms isthrown into operative position, the other such mechanism thrown into in operative position, and means adapted to be engaged by the iilm on lhe spool last inserted for actuating said interlockingl mechanism.

10. A roll ihnholder i'or cameras having," winding mechanism at both spool stations and means whereby the introduction ot a full spool into either station shall render inoperative the winding mechanism olf that station anch render operative the Winding mechanism of, the other station, said means comprising a parl: requiring to he prelimfr narily moved by contact with lilm on the spool.

11. A rollv film holder ilior cameras having` winding mechanism at both spool statifms means.whereinr the introdnctnm et a spool containing iihn into one station shall render thewinding mechanism ott" that station inoperative leavingr said spool free to turn under tension on the lihn alone, and shall render the winding mechanism olf' the other station operative.

i 12. A roll film holder for cameras having winding mechanism at hoth spool stations, means whereb)T the introdmrtion o't a. Alull spoollinto one station shall renden the winding;r mechanism olE that station inoperative leaving` said spoolL :free to turn under tension on the lilm alone, and .shall 'render thc Winding mechanism of the other station operative.

13; A roll lilmi holder `lor cameras having Winding mechanism at both spool stations andl means whereby the introducthm of a spoolcontainingfilm into one o l" said stations sha-ll` render the winding; mechanism oli said station inoperative and shall render the winding* mechanism of the other station operative, said means heine; incapable of operation by an empty spool.

A roll film holder tor cameras having winding'` mechanism at both spool stations andmeans whereby theinlrodiufl ion ol a l'nll, spooll into one olz said stations shall render the winding mechanism o'l' said station inoperative and shall render the winding mechanism of the othenstation operative, said means heine'` incapable oli operation by' an empty spool.

15. A roll lilm holdcritor cameras harina- Winding mechanism at both spool stations, means actuated by the introduction ol a spool containing' l'ilm vl'or rendcrimaone ol saidl mechanisms inoperative when the other is thrown into operative position, said means cr-nacer being so constructed as not to he actuated by the winding-j or' lilm `upon an empty spool allier it has heen intrrnluced into position in the holder.

lo. .-i roll lihn holder for cameras having vfiudingyj mechanism at both spool stations, moms actuated hy the introduction ol? a lull spool for rendering one oi" said mechanisms .iuopcralive when the other is thrown into omrrativc positionn said means being.;r so construclol as noi lo he actuated by the wind ino' olE lilm upon au cnmtv imool alitcr it has heen introducelfl into position` i'n the holder.

1T. ln a roll lilm holder for cameras, the combination of windingY mechanism at' both spool stations, interlocking mechanism wherebyv when one oi said winding lneehanismo is throwm` into operative positionythe other such mechanism is throwir into.` inoperative positiom means adapted toohe enaagrcd hv a spool 'for :inciting said interlochinpj mechanism1 and moans adapted? to or engaged by the hlm oir the spool tor con:- ncctinpsaid last-mentioued means with said interlocliiiro' mechanism.

lo. ln a roll film holder :for cameras, the combination oi windiinr mechanism` at both Yspool stal-ions. interlocking' mechanism wherehy when one ol? said windingmechamsnm is thrown into operative position, the other such mechanism is thrown in to in.h oziiorative position, means adapted tohe en- .;c red lof the spool for actuating` said im tcV ocliinn imfclianism.` and a trigger device adapted, hv contact with the lilm` oir the spoollo connect said last-mentioned means with said interloclrinaI mechanism.

lil. la a roll lilm holder 'for cameras. the cmnhimiliou oli winding` mechanism at hoth spool stations, means whcrchithe introdnc tion of a 'lull spool causes one of iid` mechanisms lio he disconnected from its spool; and its handle to he locked from` turning and causes the other of said mechanislns to be cndcred operativei and means whereby the handle o1 said last mentioned mechanism is prevented 'from turning" backward.

zal. ln a roll film holder for ca1i1e1ras,.tlie combination oi wirulinu mechanism at both spool stations and means wherebyY the introduction ot' a lfull spool shall lock and render imperative the windingr handle at that spool @intimi and shall put the windingr handle ai' the other station into operative condi tion.

ill. ln i roll lilm holder lior cameras. the comhina n of winilinnr mechanism at hoth 'iol stations means wherehy the introducol" a 'lull spool shall loch and render immer-alive the wimlinir handle at that spool station and shall put the whirling handle al', the other station into: operative condition. l means for provenline` movement oli .said ys ,rinentioned handle backward.

22.' In a roll film holder for cameras 7 winding mechanism for a spool comprlslng a part adapted to engage and rotate a Spool,

Y a handle for rotating said part, said handle being so connected to said part as to be capable of rotation independent thereof, and means for rotatively connecting` said parts.

23. In a roll film holder for cameras, Winding mechanism for a spool comprising a part adapted to engage and rotate a spool, a handle for rotating said part, said handle being so connected to said part as to be capable of rotation independent thereof, and means adapted in one position to rotatively connect said handle and said part and'in another position to Vdisconnect .said parts and to loch said handle from rotation.

24. In a roll iilm holder for came-ras, Windingmechanism for a spool, comprising a part adapted to engage and rotate a spool, a handle for` rotating said part, said handle being so connected to said part as to be capable of rotation independent thereof, means for rotatively connecting said parts, and a connection between said handle and said part wherebymovement of said handle can Withdraw said part from engagement withr the spool Without disturbing the means for rotatively connecting` said handleV and part. f f

Q5. In a. roll film holder for cameras, Winding` mechanism for a spool comprising a part adapted to engage and rotate a spool,

a. handle for rotating said part, said handle being` so vconnected to said part as to be capable of rotation independent thereof, means adapted in one position to rotatively connect said Yhandle and said part and in another position to disconnect said parts to loch saidv handle from rotation, and a con-A nection between said handle and said part whereby movement of said handle can Withdraw said part from engagement with the spool Wit-hout disturbing the means forr rotatively connecting said handle and part.

2G. In a roll film holder for cameras, a Winding mechanism comprising a handle,

a part adapted to engage a spool for rotating` the same, a stem upon which said part is mounted, tivo clutch-members, mounted on said stem, one ot said membersA being rota# tively engaged with said spool-engaging part and the other of' said members being rotatively engaged with said handle.

27. In a roll [ihn holder for cameras, Winding mechanism for a spool comprising a part adaptedjto engage and rotate the spool, a handle lor turning said part, a stem connecting said part and said handle, clutch members mounted on said stem. one ot said clutch members beings; vertically. slidably mounted relative to said spool-Winding part, and the other of said clutch members being similarly mounted relative to said handle, means for shifting said clutch members to engage andv-disengage them, and means for llocking from rotation that clutch member similarly mounted relative to said handle,

nand the other of saidvclutch members being means or shifting said clutch members to Y engage and disengage them, means for lock ing from rotation that clutch member which is connected with the handle ,when said clutch member is in unclutched position, and means for preventing said handle from rotating backward. e

29. In a roll film holder for cameras, t-he combination of a part adapted to engagera spool for Winding the same, a handle for rot-ating said part, a stem upon which said partis mounted, said stem having ahead or shoulder that rotatively engages said handle, so that said stem may be moved longitudinally by said handle, clutch sleeves mounted upon said stem, said sleeves being slidabl'y, but non-rotatively, connected, re-

spectively, with said spool-rotating part andY with said handle, teethon said last-mentioned sleeve, and a tooth on the frame of the film holder, in such relation that when said clutch member is in disconnected relation said tooth shall be in engagement with said teeth and lock said handle from rotation.

30. In a roll film holder for cameras, the combination of a part adapted to engage a spool for winding the same, a handle for rotating said part, a stem upon which said part is mounted, said stemhaving a head or shoulder that rotativelyV engages said handle, so that said stem may be moved longitudinally by said handle, clutch sleeves slidably mounted upon said stem, said sleeves being slidably, but non-rotatably, connected, respectively, with said spool rotating` part and with said handle, teeth on said last-mentioned sleeve, a tooth on the frame of the film holder, in such relation that when said clutch member is in disconnected relation said tooth shall be in engagement and lock said handle from rotation, and means for shifting said last-inentioned clutch member, said member having ratchetteeth and said means having a paivl or paivls for engagement therewith.

3l. In a roll film holder for cameras, the combination of Winding mechanism at both stations, said Winding mechanisms having means whereby their handles may be rotatively disconnected from the spool-engag- Ill) u level' havinn' a tinflfei' ing' ilalt, a llal't having' cani` Alol' dieengag ing'one o'l said handles While elleaging the othel' lheleol'. and lneane oiel'al'ed by the inll'odnetioll. oa apool eontainine` llln into one ol1 said .stations 'lol' :3o elhi'ltinn Said ilal't as to dieen'jnng'e the handle ol the slet-ion having` the Spool and engage the handle olf the opposite Aelation.

3:2. ln a l'oll Alillll holder Llol' 'anle'asi the el'llnhinalion ol winding lneehalliriln at both, stations. said milliline` lneelnlnielne having lneanii whereby theill handles lnanv be l'olatively dieeonneete-:l Vll'oln the spooleengaging part, a llal't ha 'ingv ealne lol' lint=ileilgi1l1j one ol eaid handlee` while engaging the othei` thereof. and means ope'ated by the int1'odnelion ol a lfnll spool into one of said :5tat-iona lol' no Lerllit'tinggj said pal't ae to disengagre the handle oi' the station having;` the flill Spool and engage the handle olI the opposite station.

31%. In a l'oll lillll holdel' l'oleanlel'ae, the eonlbination of ivlllding;l nleellanienl a both stations, said winding lnel'hanislns.having means lvhei'ehy their handle` nlay be i'otatively diseonneel'ed :ll'oln the ailoolellgniging part, a pal't having ealns fol' dialoog/aging one oit said handles While ell aae'illnl the other thereof, and .lneano opel'ated by the intro` dlletion ol.i a spool eontaining'A lilln into one. of Said Stations 'l'ol' so ehiililinej eaid 'partan to dieengage the handle ol" the station having the spool and engage the ha idle ot the opposite statioln said nleane eonlijn'ising' a adapted lo be engaged and lnoved by the spool beine intl'odni'edv` and said cani-bearing lnelnhei" having a pin ol.' shoulder that adapted to be inoved by `eaid level" when so .moved b v the spool.

3l. ln a l'oll illn holder for eanlei'iw the eolnbination ol'I winding' llleehanisnl at both stations, Said windingr mechanisme havingl means whereby their handles inay be lol'atively disconnected from the spool-engaging; part, a pal't having' came fol' disengagring one oll said handles While engagillg the otllel' thereof, and ineens operated by the intl'oduction ot a lull Spool into one of said stations :lol' eo Shifting Said part as to dieeninge the handle ol the Station having the full spool alld engage the handle ot the opposite etatioln said nleans comprisingP a level' having a linge' adapted to be engaged and lnoved by the spool being inti'odlleed, and said oilllnbeal'ing lnelnbel having a `pin ol' shoulder that is adapted to be lnoved by Said level' when so moved by the spool.

35. lill a l'oll lihn` holdel' 'l'ol' ealnel'iif-. the eolllbination ol Windingr llleehllnilinl :it both stations. said winding" nieehanienla having' .oleane ivllel'elly their handles nlay be votatively` dieeollneeled ll'oin the Spool-engaeing para a part having laine lol' disengagring one of Said handles While engaging the other thereof, and n'leansope 'ated by the introduction o1' a spool containing lihn into one ojl" :iaid stations `lol' so shifting;r `aid part as to dieene'ae'e the handle oli the station having the spool and engage the handle ot the opporsite el'lltioll, `aid .oleane` eonlln'ieinn a level.' havilll y a linee" alhlpled` to lle engaged and nloved by the spool being;n inll'odneed, said ezllnbenl'innl lnelnbel' having a pin ol' :ihollldel' t lat ie adapted to he nloved by said level' when so moved bv the Spool, and said level' having;` a pal't eapable ol yielding' in pinning; said bin ol' ehollldel in. letln'nin.l lo nol'nlal position.

2li?, ln a l'oll lilln lloldel' lol' mineras, the e mlbilllltion ol whaling n'leehanisnl at both stations. lwald ivinlglinel nleelnlnienle havingnr nleane4 whereby then' handles may be l'otatively dieeonneeted ll'onl the :spool-engaging nari, a part having :anni i'ol' dieengaging one olt said handles while engagingthe othei` llleleol'. and nleanh` ollelfated by the intro? duel-ion ol:I a Tl'llll spool into one oit said sta- 'onrs lol.' no .ehilli lwald` `palt ae to disenlane the handle o'l the station having the ifnll spool and engage the handle oil the onbonite station. :mid lneanfl eo1n1'n'isin;l a level' having` a linge' adapted to be engaged and lnoved by the spool being' introduced, said galn-llearinn nlelnbel' having a pin olf ehonldel' that is adapted to be nloved by said level.' when .eo nloved by the, spool. and Said level' having' a part (,'apllble olf yit-llding in panning; .eaid pin ol' Shoulder ill l'etln'ning to l'lol'nlal position,

2l?. In a i'oll l'ilnl lloldel.' 'lol' eanlelfae, the eolnbiilation ot Winding;` llloehanisln at both stations, said winding llleehanielm; having ineann lvllel'eby their handles lnay be l'ot:ltively disconnected l'oln the e}loolengag ine: para a nal't llllvingl nains tol' disengaging' one ol Said handlee lvhileeneaging the other tliei'eo'l"` and lneans opeated by the intl'odnel'ion of a l'nll spool into one ot said stallone lol" so shifting' said part as to disengage the handle ol the station having the lfilll enool and engage the handle ol` the opposite station. Said means eolnpl'islng a level' havingi a linee' adapted to be engaged and nloved by the spool beine' illtlfodneelh said faln-beavillev nielllbel"having; a pin o1' rhonhlel' that le adapted to be nloved by said level' when iso nloved by the npool. and .said lingell being: adapted to lle engaged by the thingie ot' the spool and having a trigger that adapted to be pl'elilllinal'ily engaged by the lilln on the lspool and to lool( .said linge' and level' together.

'ltl. ln a l'oll lilln holder :lol' e'alnelnsj the eolnbinal'ion olE ivindillgl; lneehanisln al both tallone` mid winding' lneehanisole` having' oleane whereby their handles lnay be l'otatively dieeolnleeted 'l'l'oln the @pool-engaeinglr part, a part having: onlne fol dieengaging;- one olf Said llanlflles `while engaging the other thereof, and ineens operated by the introlll() y spool,

duction of a full spool into one of Vsaid Stations for so shifting said part as to disengage the handle of the .station 'having the 'fullspool and engage the handle or' the opposite station, said means comprising a lever having a finger adapted to be engaged and moved bythe spool being introduced, said -cam-bearing member having a pinv or shoulder that is adapted to moved by Said lever when so moved by theispool, andv said 'fingerbeing adapted, to be engaged by the flange oit the spool and having a trigger Vthat is adapted to bepreliminariy engaged combination ofwinding mechanism at vboth stations, 'said winding' mechanisms having means whercbj their handles may be=rotatively disconnected'from the vspool-engaging part, a part `having cams for disengaging one of said handles while engaging the other thereof., and means operatedy by the, introl duction of a full spool into one of said sta-y tions for so shifting said part as toydisen'- the handle of the station' having the full spool and engage the handle of the opposite station, said means comprisingv a lever havingV a finger adapted to be engaged and moved by the spool being introduced, said cam-bearing member having ay pin or shoulder that is adapted to be'moved by said lever whenk so moved Vby the spool, and said finger being adapted to be engaged by the flange of the spool and having a trigger that is adapted to be preliminarily engaged by the film on the spool and to lock said finger and lever together, said finger and trigger being provided with springs tending to throw them toward the incoming spool, the spring for the finger being stronger than the spring having a. spring tending to throw its fingerbearing arm toward the spool, the spring of said lever being stronger than the spring of said finger.

40. in a roll film holder for cameras, the combination of winding mechanism at both stations, said winding mechanisms having means whereby their handles may be rotatively disconnected from the spool-engaging part, a part having cams forl disengaging one of said handles while engaging the other thereof, and having pins or' shoulders for shifting it, and means operated by the introduction of a spool containing film into one of said stations for so shifting said part,

said means comprising a lever adapted to engage one of said pms or shoulders and vhaving a finger adapted to be engaged and .said lever, but sufficiently for the trigger, and said lever` holder ,for cameras, the

ycombination of Windingmechanism at both stations, said winding mechanisms 'havingl means whereby their handles may be rotatively disconnectedfrom the spool-engaging part, apart having cams for disengaging one of saidhandles while engaging theoth'er thereof, and having pins or shoulders for shifting it, `and means operated by the introduction of a full spool into one of said stations ior so shifting said part, said means "and, then toV comprising a lever adapted to engage one ofI s said pins or shoulders andhaving a linger adapted to be engaged and moved bythe spool being introduced,said cam-bearing part having a pin or shoulder, and a yieldingr projection or hump in such relation to said pin or shoulder as to be depressed by movement of said part'under the action of said lever during the early part of the movement of said lever, and then to throw said part in the direction of movement caused by beyond said lever to carry saidfirst-mentioned pin or shoulder out of contact with said lever. n V

42. In a roll hlm holder for cameras, the

combination of winding mechanism at both y spool stations A means whereby the introduction of a full spool disconnects one' of said mechanisms vfrom its spool andconnects theother of said mechanisms with its spool, said means comprising a lever having a finger pivoted thereto, which finger is adapted to engage a flange of the spool, said finger carrying a. trigger that is adapted to engage the film on said spool and to throw its heel toward the pivot of said finger sufficiently to engage a shoulderon said lever, said trigger projecting sufliciently toward the spool to contact with the film before the finger contacts with said flange, and springs for hold ing said parts in said relation.

43. In a roll film holder for cameras, the combination of winding mechanism at both spool stations, tion of a full spool disconnects one of said mechanisms from its spool and connects the other of said mechanisms with its spool, said means comprising a lever having a finger pivoted thereto, which finger is adapted to engage a flange of the spool, said finger llOV means Ywhereby the introduc- Y carrying a trigger that is adapted to engage stop or l`should( the film on said Spool and to throw ite heel toward the pivot "ot Said finger snfliciently to engage a shoulder on said lever, said trigger projecting Snllieiently toward the Spool to Contact with the film before the Vlinger contacts` with seid 'thingje, Springs tending to hold seid parte in Said relation, end e fr on Suid` linger :igninet which the `heel `of seid trigger may rest when Suid tri` r in itel lnieltmird position.

el In gi roll tilnihoider :tor reim-rue1 the eomhinzrtion ot winding' mechanism it both spool stations, menne whereby the introdnetion `oi :i ifuil Spool dieronnecte one olf Suid nieehnnisnis from its spool :ind Connects the other of said ineelninisgms with its spool. Seid ineens tomprisinfrg :i lever hitting t linger pivoted thereto, which iingger is :tempted to engage n llnngeo the spool` seid linger carrying `a` trigger thirt is adopted to engage the tihn yon said spool and. to throw its heel towrtrtl the pivot of 4f-iid linger enli'ieiently o engage :1 shoulder on Suid lever, .ea-id trigger projeetinfjT enllieientlyv toward the spool to Contact with the `lilzn before `the linger Contacts with said llzingt, and springe tending to .hold said parte in seid relation, the shoulder on Seid lever und the heel oit seid trigger being so proportioned that ill seid linger `he swung on its pivotbeiore seid trigger is moved, subsequent movement of mid trigger cannot enlise heel to ,Strike against said shoulder.

45. In :i roll tihn holder for ezunerns, the

combination of winding mechanism at both Spool stations, means wherehyithe introdnt tion of n, full spool disconnects one ot Suid mechanisms troni its spool :ind eonneets the other oit said mechanisms with its spool, said ineens comprising :L lever having :L linger pivoted thereto, which linger is adopted to en gege :i [lange oit the spool, seid linger carrying ai, triggerl that is adapted to engage the [ihn on Sziid epool und to throw ite4 heel toward the pivot. ot :mid `linger sililljieiently to engage :L shoulder on seid levei',`snd trigger projecting :nillieiently towzirdthe spool to oo ntziet with the lihn before the linger contexts with enid flange, springe tendingr to hold said. parts in said relation, :find :i stop or shoulder on Suid linger zigzrinetwhieh the heel oi eziid` trigger muy rest Whensuid trigger is in its backward position, the Shoulder on Seid lever and the heel of eziidtrigger being so proportioned that il Suid linger be swung on its pivotliefore said triggeris moved, enlise` quent movement of Said trigger cannot ermee itev heel toetrile zigziinstsnid Shoulder.

`In testimony that I ehiim the foregoing, I herve hereunto eet my hund this 1st dey otlfelnnery,1924.

EDVIN J. PRINDLE. 

